MAX9000EUA+T

Overview

The MAX9000EUA+T is a low-power, high-speed single-supply integrated circuit combining an operational amplifier, a comparator, and a precision voltage reference. It operates from +2.5V to +5.5V supplies with typical quiescent current of 410µA. The unity-gain stable op amp offers a 1.25MHz gain-bandwidth product and 0.85V/µs slew rate. The comparator features 185ns propagation delay and ±2mV hysteresis. An internal 1.230V reference provides ±1% accuracy. The device is housed in an 8-pin µMAX package.

Feature Summary

• Integrates a high-speed op amp, fast comparator, and precision reference in a compact µMAX package
• Operates on a single supply ranging from +2.5V to +5.5V with ultra-low power consumption
• Features rail-to-rail outputs for both the amplifier and comparator stages
• Includes built-in comparator hysteresis to ensure noise immunity and signal stability

Applications

• Single-supply zero-photodiode preamplifiers
• Crossing detectors and smart card readers
• Infrared receivers and bar-code readers for remote controls
• Keyless entry systems and sensor signal detection

Procurement Notes

Verify the specific suffix 'EUA' corresponds to the -40°C to +85°C temperature range and 8-pin µMAX package configuration. Confirm RoHS compliance status through official manufacturer documentation before integration into final designs.

Selection Notes

Select this component when space-constrained designs require combined amplification, comparison, and reference functions. It is suitable for portable applications due to low supply current. Ensure the 1.25MHz bandwidth meets system speed requirements compared to higher-speed decompensated variants.

Part Context

This part belongs to the MAX9000 family of mixed-signal ICs designed for battery-powered electronics. The family includes variants with shutdown modes and different amplifier bandwidths. The MAX9000 specifically integrates all three functional blocks without a shutdown pin, offering a complete solution in minimal footprint.

Replacement Considerations

Official substitutes within the same series include MAX9001EUA+T, which adds a shutdown control feature while maintaining identical electrical characteristics and package dimensions.

FAQ

How does the MAX9000 handle overdriven inputs?

The device is designed with no phase reversal for overdriven inputs for both the operational amplifier and the comparator, ensuring stable operation even when input signals exceed the common-mode range.

What is the function of the comparator's inverting input in the MAX9000?

In the MAX9000, the comparator's inverting input is internally connected to the precision reference output, simplifying circuit design for threshold detection applications.